Smoke-consumer.



PATBNTED APR. 21, 1908.

H. P. BRADBURY.

v SMOKE CONSUMER.

APPLICATION FILED 0OT.25,1906

Z O t 1 1 a U L v UNITED sTAT us PATENT OFFIC.

HENRY BRADBURY, OF S PRINGFIELD, OHIO, ASSIGNOR OI" ONE-HALF 'IO L. H.PURSELL,

' OF SPRINGFIELD, OHIO.

SMOKE-CONSUMER.

Specification of Letters Patent.

Patented April 21, 1908.

Application filed October 25, 1906. Serial No. 340,601.

To all whom it may concern:

Be 1t known that I, HENRY P. BRADBURY,

r a citizen of the United States,-residing at Springfield, in the countyof Clark and State 0 Ohio, have invented certain new and usefulImprovements in Smoke-Consumers, of which the following is aspecification.

My invention relates to smoke consumers and is particularly adapted foruse in connection with steam boilers but may be used in connection withother devices.

The objectof the invention is to greatly simplify the construction aswellas the means and mode of operation of such devices whereby they willnot only prevent the escape of smoke from the stack or chimney but willprevent the accumulation of soot and other products of combustion withinthe stack and the boiler setting.

A further object of the invention is to provide means for consuming theparticles of carbon and combustible gasesset free during the process ofburning coal and which are usually lost by their escape through the flueor the chimney.

A further object of the invention is to provide means for burning thesmoke and gas at the oint'of greatest advantage, that is, where t e heatmay be used for heating the 3 boiler or for other purposes.

With the above primary and other incidental objects in view, as willappear from the specification, the invention consists of the means,construction, devices and mode of operation, or their equivalents,hereinafter described and set forth in the claims.

- In the drawings, Figure I is a sectional View of a boiler settingshowing the boiler, the fire-box and the auxiliary fire-box. Fig.

40 2 is a perspective view-ofthe boiler setting extended rearwardly andslighglg together with a portion of' the stack, the blower and conduithereinafter described. .Fig. 3 is a plan view showing the relation ofthe stack'and conduit and blower, or rotary Referringbby letter to thedrawings, a represents the oiler, a the stack. a is the usual boilersetting.

7 a is a fire-box; a the ashit below it. I

a, is the bridge wall. T e bridge wall is upwardly, the bridge .as ataf. Immediatcly back wall, a intermediate said bridge wall, a

and a supplemental bridge wall, a, and below the extension, a, islocated an auxiliary firebox, I). The fire-box, a is ada ted to burneither coal or slack, or other fue of the ordinary type. Within theauxiliary fire-box, b, is preferably used coke, although other kinds offuel may be successfully employed. A rotary fan or blower, b, isprovided having a conduit, bflleading therefrom and discharging intotheash-pit, 6 below the auxiliary forces a constant stream of air throughthe conduit, 5 to the ash-pit, if, of the auxiliary fire-box, b, and bysuction through the conduit, 1), draws from the stack, a, the hot gasesand such smoke as may be passed to the stack, causing said smoke andgases to be returned through the conduit, b", to the ashfplit, b thencepassing through the hot coke re to again pass through the same channelsas before. The hot gases and smoke drawn from the stack through theconduit, 1), will warm the air in the conduit, b which has been taken inthrough the rotary fan, I), so that .the current of air passing throughthe auxiliary fire box, I), from the conduit, b will in no way chill thesmoke to form soot, nor

will itchill the boiler or any adjacent parts,

but will supply a constant stream of oxygen to be mixed with the gasesreleased from the coal in the fire-box, a and will form therewith acombustible mixture which will burn with intense heat at the point, 0,the exit from the auxiliary fire box, 1), between the rear extension, a,and supplemental bridge wall, a. Any gases which may escape combustionatv this point will be again returned through the conduit, 6 with anadditional supply of warm fresh air.

The extension, a, of the bridge wall, a as before stated, is extendedrearwardly and slightly upwardly, and this extension is of such shapeand thickness that it gives direction to the ases and products ofcombustion from both rnaces, so that they are flowing in substantiallythe same direction wherethey come together at or near the point c. Thisextension of the bridge Well also becomes hot and tends to furtherhe'etthe gases" from the main furnace as they assover the same, so thatthe combustion at this pointis as erfect as can be secured.

x mm the above description it Will-be epparent that there hesbeenproduced it construction in which a constant sup iy cfexyen Wiil beprovided to mix ne'th t e. gases 1-seased in the primary fire box toforms coin bustible mixture, which will burn-at emost advantageouspoint, and that the snpniy of oxygen thus provided will be snfiicientiyheetedlthet it Wih in no wise chill the smoke to for-Insect Within thestructure, nor wiii it chill the beiier or any adjecentfpertsg. it isfurther obvious that the constrnctisn described wiii in no Way retardthe-flew of the smoke or gwes', nor will it'i'nteriere Wither retard thedreit, but to the contreiy, through. v

the conduit, 5", from the stack, efltviii ecceier-j ate the dreft. it ise parent that throughtheacceleration of the sit and the burning of thesses below the boiler that the efiicienc will e greatly increased.

It 18 obvious that the structure is SUSGQ/pr' tibie of modiiioetien inits form, proportion, detailed construction and arrangement of pertsWithout departing from the principle involved or sacrificing any of itsadvantages. i do not, therefore, limit myself to the exact constructionshown and described.

Having thus described my invention, 1-

1. in a construction such as described, a plurality of fire-boxes, edividing Wei separating one fire-box from the other, one fire-- boxbeing at the rear of'the 'otherin the line of draft, e refractory roofextending rear- Werdiy from thedividing Wall and projecting over thereer firebox, a passageay formed by an opening in the refractory roofand near seems the rear end thereoffor the assege ,o'f' -the" productsof combustion, a; we :formed above the openingfor causing the. flamesfrom 3 the fire-boxes toteke'a, rearward course.

productsof combustion, '9; well formed above the opening for causing theflames from the fire-boxes to take a 'reerwerd course, and meansfor'forcing a draft .throughsaid passe%e-wey away from the fire boxes,substantia iy es-speoified. v 4

3. lne construction such as described, a pinrshty oi'fiIe-bexes, isdividing Well separetingfone fire-.boxfrom" the other, one firebox beingat the rear of the other'in' the'lin'e' of, arse, a refractory 'roofextending reap wsrdlyfiem the dividing Well and pro eating over the rearfire-box, e passage-way formed byen opening in. the refrectory roof andnear the-rear end thereof for the assege of the products of combustion,e Wei formed above the opening 'for causing the flames from thefire-boxes to take a rearward course, and Y means foriming a draft,through said passage-Way away from the,fire-boxes, 'a stack end a ismfor fencing a draft from said stack, and a pesse 'e-Wey' connecting thefan With the rear fire 05:, substantially as specified.

In testimony whereof, I have hereunto set my hand this 22nd day ofOctober A. D.-

HENRY P. BRADBURY. -Witnesses:

CHAS. L WELOH,' CLARA GALLAGHER.

